Is magnesium glycinate the best form of magnesium?

Glycinate is well absorbed and gentle, which makes it a popular choice, but citrate is also well absorbed. Oxide is less well absorbed but common in blends. There's no single 'best' form — check the elemental magnesium per serving either way.

How much magnesium do I need per day?

UK guidance puts adult needs at around 300mg a day for men and 270mg for women, including magnesium from food. Supplements contribute on top, so check the total.

Does Grass & Co. sell a magnesium supplement?

No standalone magnesium, no. RELAX capsules contain 200mg magnesium oxide and Liquid RELAX contains 70.5mg magnesium citrate per can, both as part of the evening formulas.

Can I take magnesium glycinate with your RELAX capsules?

Many people combine a standalone magnesium with blended supplements. Follow each product's label, add up your total magnesium, and check with a doctor if you're pregnant, on medication or have kidney issues.

The Field Guides · Last updated 7 October 2026

Magnesium glycinate UK: which form of magnesium do you actually need?

Is magnesium glycinate the best magnesium supplement in the UK?

The short answer

Magnesium glycinate is one of the better-absorbed forms of magnesium and the one most often recommended for an evening routine — which is why UK searches for it dwarf every other magnesium question. The honest picture: glycinate and citrate are well absorbed, oxide is less well absorbed but very common because it's compact and inexpensive. We don't sell a standalone magnesium supplement, but magnesium is already in two RELAX products: RELAX capsules carry 200mg of magnesium oxide alongside ashwagandha and Maitake, and Liquid RELAX carries magnesium citrate — 70.5mg per 250ml can. If you want a dedicated high-dose magnesium glycinate, a magnesium specialist is the better buy; check the elemental magnesium per serving, not the compound amount.

Magnesium forms compared

Magnesium forms compared
Form	Absorption	Typical use	Watch for
Glycinate (bisglycinate)	Well absorbed, gentle on the stomach	Evening routines; popular standalone supplement	Prices vary a lot — check elemental magnesium per serving
Citrate	Well absorbed	Standalone supplements and drinks	Can be laxative at high doses
Oxide	Less well absorbed	Compact, inexpensive, common in blends	Elemental dose looks high but absorption is lower

Where magnesium sits in our range

Where magnesium sits in our range
	RELAX capsules	Liquid RELAX
Magnesium form and amount	200mg magnesium oxide per capsule	70.5mg magnesium citrate per 250ml can
What it's paired with	150mg ashwagandha root powder, 500mg Maitake, vitamin B6	250mg ashwagandha extract, 1,000mg reishi, B vitamins
Best moment	Evening wind-down	The evening drink — sparkling, low sugar, caffeine free

The trade-offs

Dedicated magnesium glycinate

Well-absorbed form
High elemental doses available
Gentle on the stomach

You're buying one mineral — check price per serving
No mushroom or botanical companion ingredients

Blended products with magnesium (like ours)

Magnesium paired with ingredients for a wind-down routine
B vitamins carry permitted UK claims
Batch lab reports published

Lower magnesium dose than a dedicated supplement
We use oxide (capsules) and citrate (drink), not glycinate

The verdict

If a standalone magnesium glycinate is what you're after, buy one from a specialist and judge it on elemental magnesium per serving and price. If you'd rather have magnesium as part of an evening routine, it's already built into RELAX capsules and Liquid RELAX — just know which form you're getting, because we'll always tell you on the label.

Where Grass & Co. loses

We don't sell a standalone magnesium supplement, and we don't use glycinate: RELAX capsules use magnesium oxide and Liquid RELAX uses magnesium citrate. If you want maximum magnesium per pound in the best-absorbed form, a dedicated glycinate brand wins. And no magnesium product can honestly promise dramatic overnight results — the permitted UK claims (muscle function, nervous system, reducing tiredness and fatigue) need meaningful doses, which is exactly why dedicated supplements carry more.

Mentioned in this piece

Questions people ask

Is magnesium glycinate the best form of magnesium?: Glycinate is well absorbed and gentle, which makes it a popular choice, but citrate is also well absorbed. Oxide is less well absorbed but common in blends. There's no single 'best' form — check the elemental magnesium per serving either way.
How much magnesium do I need per day?: UK guidance puts adult needs at around 300mg a day for men and 270mg for women, including magnesium from food. Supplements contribute on top, so check the total.
Does Grass & Co. sell a magnesium supplement?: No standalone magnesium, no. RELAX capsules contain 200mg magnesium oxide and Liquid RELAX contains 70.5mg magnesium citrate per can, both as part of the evening formulas.
Can I take magnesium glycinate with your RELAX capsules?: Many people combine a standalone magnesium with blended supplements. Follow each product's label, add up your total magnesium, and check with a doctor if you're pregnant, on medication or have kidney issues.

More comparisons

Grass & Co. products are food supplements and are not intended to diagnose, treat, cure or prevent any disease. Do not exceed the stated dose. Most products are for adults; CBD is for adults only.